Web feeding mechanism

ABSTRACT

Male and female cutting cylinders, an elongated cutter disposed longitudinally of the male cylinder, and longitudinally spaced impaling pins carried by the female cylinder for impaling the web, in advance of its engagement with the cutter, to hold a sheet severed from the web, and to release it to a folder or other mechanism, or to delivery. The impaling pins are so arranged that during penetration of the web, the axes of the pins will form angles of 90*, or slightly more, with the vertical plane of the web which moves downwardly between the cylinders.

United States Patent William B. Raybuck 200 North Lansdowne Ave., Lansdowne, Pa. 19050 [21] Appl. No. 830,945

[22] Filed June 6, 1969 [45] Patented July 20, 1971 [72] Inventor [54] WEB FEEDING MECHANISM 3 Claims, 4 Drawing Figs.

[52] US. Cl 83/154,

83/103, 83/423 [51] int. Cl B6511 35/08 [50] Field otSearch 83/154, 151, 103, 423

[56] References Cited UNITED STATES PATENTS 1,466,001 8/1923 Metzner et a1 83/103 X 1,473,377 11/1923 Langston 83/103 1,816,329 7/ 1931 Johnston 83/103 2,318,173 5/1943 Luehrs .1 83/154 X 2,381,955 8/1945 Hoffman et al. 83/154 X 3,186,274 6/1965 Winkler et al. 83/103 Primary Examiner-Frank T. Yost Attorney-Necho and Kimmelman ABSTRACT: Male and female cutting cylinders, an elongated cutter disposed longitudinally of the male cylinder, and longitudinally spaced impaling pins carried by the female cylinder for impaling the web, in advance of its engagement with the cutter, to hold a sheet severed from the web, and to release it to a folder or other mechanism, or to delivery. The impaling pins are so arranged that during penetration of the web, the axes of the pins will form angles of 90, or slightly more, with the vertical plane of the web which moves downwardly between the cylinders.

PATENTEDJULZOBYI 3593606 SHEET 1 [IF 3 FIG! INVENTOR WILLIAM B. RAYBUC K MAN NECHO 8s KIM ATTORNEY PATENTEDJULEOB?! 3; 593,606

SHEET 2 U? 3 INVEN WILLIA RAYBUCK NECHO & KIMMELMAN ATTORNEYS PATENTEB JUL20 l8?! INVENTOR WILLIAM B. RAYBUCK NE KI ELMAN AT N WEB FEEDING MECHANISM THE BACKGROUND As far as I am aware, it has been the practice to mount the impaling pins so that they slanted downwardly in the direction of the web. This meant that, as the web was being penetrated, it had to move upwardly along the axes of the pins. This upward movement of the web resulted in elongating the initially tight, round pin holes into slots the length of which is a function of the downward inclination of the axes of the pins relative to the plane of the web. This elongation of the pin holes into slots permitted movement of the web relative to the pins with adverse results. For example, if a sheet severed from the web is on the way to a folder, the loose engagement of the pins with slots instead of with tight, round holes, results in dislocating the foldline and the sheets will not be uniformly folded.

THE INVENTION Broadly stated, the invention resides in so mounting the impaling pins that, even at full penetration of the web, the pin holes will not be elongated into slots so as to insure constant tight engagement between the pins and the sheets severed from the web.

Specifically stated, the invention resides in so mounting the impaling pins that their axes will be at an angle of 90, or slightly more, to the vertical plane of the web so that the movement of the web relative to the axes of the pins, during the penetration of web by the pins, will always be substantially parallel to the centerline of the cylinder, whereby the pin holes will not be elongated into objectionable slots.

IN THE DRAWINGS FIG. I is a vertical sectional view of conventional male and female cutting cylinders embodying the invention, the same being shown just as the impaling pins are about to begin penetrating the web.

FIG. 2 is similar to FIG. 1 but shows the parts after full penetration of the web by the pins.

FIG. 3 is similar to FIG. I but shows how my invention is applied to existing machines.

FIG. 4 is a fragmentary side view of the adapter pin used in converting a conventional machine to carry out my invention.

In the drawings, designates a conventional male cutting cylinder; 12 a conventional female cutting cylinder; M the continuous web which is to be cut into identical sections, or sheets; 16 a conventional knife which extends longitudinally of cylinder I0 and is normally sheathed by conventional cheek woods l8 and 20 which are biased radially, outwardly, by springs 21 and 22.

conventionally, cylinder 12 carries a shaft 28 which is pivotally mounted for arcuate reciprocal movement relative to the axis of the cylinder and which carries a number of longitudinally spaced pin arms 30. The means for reciprocally actuating the shaft 28, and the means for mounting the pin anns for movement with the shaft are conventional, and are not shown, nor described. It is thought sufficient to note that, in operation, the pin arms 30 are moved toward the web to engage the pins with the web, and away from the web to release the severed sheet to a folder, or other mechanism, .or for delivery to a conveyor or other means of disposal. Pin arms 30 have sockets, or the like, 32, which carry the impaling pins 1%.

Conventionally, the axes of sockets 32 and pins 3d were slanted downwardly in the direction of the web, as shown in FIG. 3, so that the webpenetrating tips of the pins were lower than the bases, or the portion of the pins which are engaged by the sockets. This inclination is illustrated diagrammatically, and not to scale, by broken lines 38, in FIG. 1.

Experience has shown that when the pins are slanted downwardly in the direction of movement of the web, the originally roundand tight pin holes which are formed by the initial penetration of the web by the pins, are elongated into slots, the length of which varies with the downward inclination of the pins relative to the web. This is due to the fact that, as the penetration proceeds, the downwardly moving web is also forced to move upwardly along the inclined pins. In a case where the severed sheet is on its way to a delivery conveyor, the slots are objectionable on aesthetic grounds only. But, in cases where the severed sheet is to be subjected to further operations, the loose engagement of the impaling pins with slots which are longer than the diameters of the pins, is objectionable on mechanical grounds. For example, if the severed sheets are to be released to a folder, the loose engagement of the pins with slots in the sheets, dislocates the foldline and makes for nonuniform folding.

In order to prevent elongation of the pin holes into slots, l mount the pin arms 30 of new machines so that the axes of the pins will be disposed as shown, approximately, and not to scale, by broken line 40 in FIGS. I and 2.. By this arrangement, the axes of the pins 34 will form an angle with the web of slightly more than which I find produces best results. It is to be understood that the apparatus disclosed can work satisfactorily when the axes of the pins are at about 87 to about 93 to the vertical plane of web 14.

Since the pins and the web move synchronously, the holes formed by pins disposed within the angular range set forth will not be elongated as they will be if the angle of the pins relative to the web is below 87, or so.

In order to facilitate the application of my invention to an existing machine without having to dismantle the pin arms, or other parts, of the machine. I provide adapters 42 which are adjustably carried by sockets 32 and which receive pins 34'. As shown in FIG. 3, pins 34 are so mounted in the adapters 42 that the axes of the pins will have the same angular relation to the web as the axes of pins 34 of FIGS. 1 and 2. Adapters 42 can be engaged with the pin sockets threadedly or in any well known manner. In order to attain exact alignment without precision machining, adapters 42 are preferably threadedly engaged with sockets 32' so that by slight rotation, the pins 34 will align at the exact angle desired.

What I claim is:

I. In a combination which includes:

a male cutting cylinder,

a cutter carried thereby,

a female cutting cylinder,

impaling pins carried thereby,

said cutter and said pin being engageable with a web moving in a substantially vertical plane into the nip of said cylinders to be impaled on said pins and severed by said cutter.

The improvement which resides in mounting said pins so that their axes form an angle of not materially less than 87nor materially greater than 93with the vertical plane of the web, at the time of initial contact of the pins with the web, the angle between the axis of the pin and the centerline of the cylinder being between 9 and 15.

2. A web feeding mechanism including:

a pair of cutting cylinders,

at least one pin arm carried by one of said cylinders,

a socket carried by said pin arm,

an adapter carried by, and coaxial with, said socket,

a-pin carried by said adapter, the axis of said pin making an angle of less than with the axisof said adapter. 3. In combination: a male cutting cylinder, a cutter carried thereby, a female cutting cylinder, impaling pins carried thereby, said cutter and said pin being engageable with a web moving in a substantially vertical plane into the nip of said cylinders to be impaled on said pins and severed by said cutter,

said pins being so mounted that, at first contact of the pins with the web, the axes of the pins will be at an angle to centerline of the cylinder and so that upon completion of the penetration, the axis of the pin will be parallel to the centerline of the cylinder. 

1. In a combination which includes: a male cutting cylinder, a cutter carried thereby, a female cutting cylinder, impaling pins carried thereby, said cutter and said pin being engageable with a web moving in a substantially vertical plane into the nip of said cylinders to be impaled on said pins and severed by said cutter. The improvement which resides in mounting said pins so that their axes form an angle of not materially less than 87*nor materially greater than 93*with the vertical plane of the web, at the time of initial contact of the pins with the web, the angle between the axis of the pin and the centerline of the cylinder being between 9* and
 15. 2. A web feeding mechAnism including: a pair of cutting cylinders, at least one pin arm carried by one of said cylinders, a socket carried by said pin arm, an adapter carried by, and coaxial with, said socket, a pin carried by said adapter, the axis of said pin making an angle of less than 180* with the axis of said adapter.
 3. In combination: a male cutting cylinder, a cutter carried thereby, a female cutting cylinder, impaling pins carried thereby, said cutter and said pin being engageable with a web moving in a substantially vertical plane into the nip of said cylinders to be impaled on said pins and severed by said cutter, said pins being so mounted that, at first contact of the pins with the web, the axes of the pins will be at an angle to centerline of the cylinder and so that upon completion of the penetration, the axis of the pin will be parallel to the centerline of the cylinder. 